Heating drum



Oct. l, 1935. s. G. GILLELAND .HEATING DRUM Filed Sept. 26, 1954 liIPatented Oct. 1, 1935 ITED ST'EES 1 Claim.

This invention relates to heating appliances of that class which employdrums between the combustion chamber and chimney for radiation of heatand for heating air and circulating it 5 within the room occupied by thedrum, and my object is to produce a drum as an attachment for a heatingor cook stove, which operates efciently and is of simple, durable andeconomical construction. A further object is to: produce a drum in whichthe products of combustion are, in normal operation, compelled at theirpoint of maximum heat, to impinge against and travel downward upon airducts, so that the temperature of the air circulating up through theducts shall be highest at or near the upper or discharge ends of theducts and relatively low at the lower ends of the ducts, it being notedthat by this opposed flo-w of the products of combustion and air, a

smaller proportion of the heat units of the fuel burned, are lostthrough the chimney, and the heating of a room is not only accelerated,but effected at a lesser cost of fuel.

More speciiically, my object is to produce a drum containing air ducts,running from bottom to top, an inlet opening forward and a dischargeopening rearward of the air ducts, and a damper adjustable to permit theproducts of combustion to pass directly from the inlet to the dischargeopening in the desired volume for starting operation, or to compelpractically the entire volume to descend within the drum for moreextended and longer contact with the air ducts, and for therefore morehighly heating and accelerating the circulation of air up through suchducts.

To accomplish the objectives mentioned, the invention consists incertain novel and useful features of construction and organization ashereinafter described and claimed; and in order that it may be fullyunderstood, reference is to be had to drawing, in which:-

Figure 1 is a broken top plan view of a heating stove embodying theinvention.

Figure 2 is a vertical section on the line II`II of Figure 1.

Figure 3 is a plan view with the top plate omitted.

Figure 4 is a vertical cross section on the line IV--IV of Figure 1. i

Figure 5 is a perspective View of the form the drum may take when usedas an attachment for a stove'.

Referring to the drawing in detail, I indicates a drum of rectangular orother suitable form,

adapted to constitute an integral part of an attachment to a heatingstove or as a heating attachment for a cook stove. In either use, thedrum is provided with a heat chamber 2 and inlet and discharge openings3 and il, for the flow of the products of combustion from the former ,5;to the latter through the heat chamber, and in the preferredconstruction, the opening 3 is in proximity to the top of the drum andthe opening 4 is in the top itself. Y

A damper is disposed within the drum and is 10 adjustable to accommodatea direct flow of products of combustion from the inlet to the dischargeopening or to prevent a direct ilow and establish an indirect iiowbetween said openings. As shown, the damper 5 is spaced above the bot-15 tom of the drum and at its lower end is secured upon a cross rod 6,journaled in the sides of the drum so that by grasping one end, it canbe turned from a vertical to an inclined position. In the formerposition, it contacts the top of the 20 drum to shut off direct flow ofproducts of combustion from the inlet to the discharge opening. In theinclined position, see dotted lines, it opens up communication betweensaid opening to accommodate the direct flow mentioned. By spac- 25 ingthe damper from the bottom of the drum an intermediate opening 'l isprovided through which the products of combustion must pass when thedirect ilow is prevented by the damper when occupying a vertical orsubstantially vertical or closed'position. It will thus be apparent thatunder the condition last mentioned, the products of combustion arecompelled to travel downward through the drum from the inlet to theintermediate opening. 35

The drum is provided with one or more air ducts 8 for circulating airthrough the heat chamber from a point below to a point above the drum,this travel of air being counter or opposite to that of the flow of theproducts of combustion, especially when the damper is in closedposition. As a result of thus providing opposed flows, the products ofcombustion lose heat in their downward travel while the heating of theair is intensied in its upward flow. It has been found that 45practically all of the heat units of the products of combustion as thelatter enters the drum are extracted by the time escape is made throughthe discharge opening and that in consequence, the temperature of a roomcan be raised to a higher degree and in less time and at less cost forfuel, than by any heating appliance or drum using the same character offuel, through which the air flows in the same direction or merelycross-wise of the travel of the products Aof combustion. For conveniencein cleaning the inte- 'rior of the drum of adhering soot, the back wallhas an opening 9 at its lower end, and a door or f Y drum, the back wallof the lire boX I I, terminates shortV of the top plate to provide theinlet opening 3. The stove may be adapted for burning solid or othertypes of fuel, and for burning wood or coal, preferably has a largedoor-controlled opening I2, a grate I3, a bottom draft control vmeans,such as a slide I4, and a top draft control means, such as a slide I5.There will also be supporting legs I6 or the like to provide for freecirculation of air up through the air ducts.

From the above description and drawing, it will be apparent that theinvention possesses the features of advantage set forth as objectives,and

that the structure may be modified in various particulars withoutdeparture from the principle of construction involved and the scope ofthe appended claim.

I claimz- An air heating drum, comprising a casing having spaced inletand outlet openings in its upper portion for products of combustion, anda series of air-ducts extending through the casing between said openingsand open to receive air below and discharge it above the casing, and adamper within and pivoted at its lower end to opposite side walls of thecasing above the bottom of the latter and in a vertical plane betweenthe `air ducts and said outlet opening, and adapted to be swung todispose its upper end against the back wall of the casing to prevent theflow of the products of combustion to the outlet opening by passage backof the damper, or to stand vertically back of the air ducts and form apartition compelling the products ofy combustion to reach the outletopening only by passing below and then upwardly at the rear side of thedamper.

SAMUEL G. GILLELAND.

